If you do decide to do this, before you take the backing off the tape, cut it in half so that you have a thinner piece that is more versatile and easy to work with. place the tape on the edges of the inner lens, while being careful not to get your fingerprints on the lens(as this is very annoying once you have it all taped back together), and then get the second lens and slowly line it up and lower it down on to the lens with the tape.
I hope this works for you. Best of luck!